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Use of metallic element made from copper-zinc- manganese alloy as electric heating element

A technology of electric heating elements and metal elements, applied in the direction of heating element materials, etc., can solve the problems of high price, expensive, CuZn alloy restrictions, etc.

Inactive Publication Date: 2017-08-08
BERKENHOFF GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of these alloys is the higher price due to the Ni content
In addition, they also have the disadvantage of sensitization and carcinogenic effects caused by nickel
[0003] Other alloys sometimes used in the prior art are disadvantageous compared to CuNi alloys
For example, CuSn alloys are also very expensive due to their Sn content; moreover, CuZn alloys (like other alloys) are limited based on required formability
In particular, the achievable Zn content is thus usually limited in CuZn alloys, so that, unlike e.g. CuNi alloys, a conductivity below 15 MS / m cannot be achieved with good forming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The metal element is composed of CuZn32.6Mn0.8 with 32.6% by weight of Zn and 0.8% by weight of Mn. The tensile strength is 500N / mm 2 , The stretch degree is 20%. The metal element has a circular cross section with a diameter of 0.6 mm at a value of 0.337 Ω / m. The conductivity is about 10.5MS / m. This embodiment is an alternative to the alloy CuNi6 in terms of conductivity and its strength is 50% higher than that.

Embodiment 2

[0021] The metal element is composed of CuZn31.5Mn1.9, with 31.5% by weight of Zn and 1.9% by weight of Mn. The tensile strength is 500N / mm 2 , The stretch degree is 20%. The metal element has a circular cross section with a diameter of 0.6 mm at a value of 0.5 Ω / m. The conductivity is about 7.1 MS / m. This embodiment is an alternative to alloy CuNi10 in terms of conductivity and its strength is almost 50% higher than that.

Embodiment 3

[0023] The metal element is composed of CuZn28.1Mn4.9 with 28.1% by weight of Zn and 4.9% by weight of Mn. The tensile strength is 500N / mm 2 , The stretch degree is 20%. The metal element has a circular cross section of 0.6 mm with a resistance of 0.9 Ω / m. The conductivity is about 3.9 MS / m.

[0024] The above-mentioned exemplary metal element can be manufactured by, for example, the following method: firstly, an element with a diameter of 20 mm is manufactured by continuous casting, then the diameter is changed to 12 mm by rolling, and finally the element is subjected to stable annealing at a temperature of 450°C to 600°C Step until completely softened. After cooling, another rolling step is performed, using another rolling step to change its diameter to 8mm, followed by another stable annealing step at 450°C to 600°C until the element is completely softened. Subsequently, after cooling, the element diameter was changed to 5 mm by drawing, and another stable annealing step wa...

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Abstract

The present invention relates to the use of a metallic element formed from a copper-zinc-manganese alloy with a copper content of at least 63% by weight as an electrical heating element, in particular for low-temperature applications.

Description

Technical field [0001] The invention relates to an application of using a metal element as an electric heating element, the metal element being composed of a copper-zinc-manganese alloy. The application may particularly involve low temperature applications. Background technique [0002] Electric heating elements for heating purposes and especially resistance wires or heating wires (or heating conductors in general) are often made of Ni alloy, especially CuNi alloy. CuNi alloy has better processability and corrosion resistance, and due to perfect compatibility, allows the material-specific characteristic curve to be adjusted in an advantageous manner in order to adjust the required resistivity. The ohmic resistance of an actual object can be calculated based on its geometric size and resistivity. Correspondingly, in the DIN 17471:1983-04 standard, different CuNi alloys are specified as resistance alloys, mainly used as heating elements or heating conductors. However, these allo...

Claims

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Application Information

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IPC IPC(8): C22C9/05C22C9/04H05B3/12
CPCC22C9/04C22C9/05H05B3/12C22F1/08
Inventor B·巴特尔马丁·格特勒亚历山大·鲁尔埃伯哈德·施密特
Owner BERKENHOFF GMBH
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